<template>
  <div class="login_container">
    <div class="login_box">
<!--      登录头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
<!--      登录表单区域-->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
<!--        用户名区域-->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
<!--        密码区域-->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
        </el-form-item>
<!--        按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>

      </el-form>

    </div>
  </div>
</template>

<script>
  export default {
    data(){
      return {
        //这是登录表单的数据绑定对象
        loginForm:{
          username:"admin",
          password:"123456"
        },
        //这是登录表单的验证规则
        loginFormRules:{
          //验证用户名称是否合法
          username:[
            {required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          //验证密码是否合法
          password:[
            {required: true, message: '请输入密码', trigger: 'blur' },
            { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
          ]
        }
      }
    },
    methods:{
      //点击重置的方法实现
      resetLoginForm (){
        // console.log(this)
        this.$refs.loginFormRef.resetFields()
      },
      login (){
        //表单的预验证
        this.$refs.loginFormRef.validate(async valid=>{
          // console.log(valid)
          if(!valid) return;
          const {data:res}=await this.$http.post('login',this.loginForm)
          // console.log(res)
          if(res.meta.status!==200) return this.$message.error('登录失败！')
          this.$message.success('登陆成功！')
          //1.将登陆成功后的token，保存到客户端的sessionStorage中
          //1.1项目中除了登录之外的其他API接口，必须在登录之后才能访问
          //1.2token只能在当前网页打开期间生效，所以将token保存在sessionStorage中
          window.sessionStorage.setItem("token",res.data.token);
          //2.通过编程式导航跳转到后台首页，路由地址是/home
          this.$router.push("/home")
        })
      }
    }
  }
</script>

<style  lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
}
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
      height: 130px;
      width: 130px;
      border: 1px solid #ccc;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        height: 100%;
        width: 100%;
        border-radius: 50%;
        background-color: #ccc;
      }
    }
    .login_form{
      position: absolute;
      bottom: 0;
      width: 100%;
      box-sizing: border-box;
      padding: 0 20px;
      .btns{
        display: flex;
        justify-content: flex-end;
      }
    }
  }
</style>
